These are some go softwares that I have tried:
I think MultiGo is one of the best go software. It is light (1.6Mb) and can open all (so far as I know) go format. It can open the usual .sgf and game format from IGS and CyberOro (which is not .SGF) and more formats.
Drago is a very good software. It has database function where you can put many games and then using kombilo to find pattern that you want. Very good for reviewing your games
TurboGo is a go software with joseki database which I find very handy to used for either begginner and advance players. It also has a screen saver function. The only problem that I know is that it's a trial program. You can use it whenever the trial has end, but you will need to wait several minutes, before it starts.
WinHonte is a software that I used very much when I started playing go. It is also featured by 6 level AI (Artificial Intelligent). But since it's a trial version, level 2 and above only featured in the first 100 moves, and then it'll change to level 1 after that.
Review Novel: Bakat Menggonggong - Dea Anugrah
10 hours ago